What is the difference between bold text and stong text?

Answer 1

The <b> element defines bold text, without any extra importance.
The <strong> element defines strong text, with added semantic "strong" importance.
https://www.w3schools.com/hTML/html_formatting.asp

Answer 2

Thanks

Answer 3

There's no difference in design. The meaning is just different. When text is surrounded with <strong></strong> tags it means that the text inside is more important. It's a semantic element.